Hydraulic elevator



(No Model.) 2 Sheets-Sheet 1.

0; H. M. ATKINS. HYDRAULIO ELEVATOR.

No. 508,169. Patented Nov. 7, 1893 I Jim 2|, 0H0- l i l 0 I [D J x h I i@ 12" q) 2 ill? (No Model.) 2 Sheets-Sheet 2.

f C. H. M. ATKINS.

HYDRAULIC ELEVATOR.

No. 508,159. Patented Nov. 7, 1893.

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UNTTEE STATES PATENT EETEE.

CHARLES H. M. ATKINS, OE BOND HILL, OHIO.

HYDRAULIC ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 508,159, dated November 7, 1893.

Applicationfiled August 3, 1892. Serial No.442,087. (No model.)

To aZZ whom it may concern:

a citizen of the United States, and a resident of Bond Hill, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Hydraulic Elevators, of which the following is a specification.

My invention relates to improved safety attachments for elevators, and particularly to that class known as pulling elevators, in which the piston pulls the rope carriage in the direction of the closed end of the cylinder when the cab or platform is being drawn upward.

Its objects are to provide means to automatically arrest the travel of the elevator should the actuating mechanism of the main valve which is under the control of the operator, break, or get out of order, or the operator through carelessness neglect to stop the cab, or platform at the upper or lower limit of its travel, and also to provide means to prevent injury to the cylinder head should all means fail to operate the main valve. It consists also in the peculiar arrangements of the main valve and supply ports to the cylinder, and means to free the cylinder from sediment, and the valve case of air.

The invention will be first fully described in connection with the accompanying drawings, and then particularly referred to and pointed out in the claims.

Referring to the drawings in which like parts are indicated by similarreference letters wherever they occur throughout the various views, Figure l is a side elevation of so much of an elevator operating mechanism with my improvements attachecL as is necessary to illustrate my invention. Fig. 2 is a detail view of some of the parts shown in top elevation or plan view. Fig. 3 is a vertical sectional view taken through the line cc. 00. of Fig. 1 looking in the direction of the closed end of the cylinder. Fig. 4. is a detailed view taken in section horizontally through the main cylinder and illustrating the means for protecting the cylinder head.

A. designates the cylinder, B. the supply, and B. the exhaust pipe, C, the main valve case which in this case is placed horizontally, above, and parallel with the cylinder A. the rope wheel D, which carries the rope under the control of the operator for operating the Be it known that 1, CHARLES H. M. ATKINS,

main valve from the cage or platform, by means of the well known pinion and rack bar, which is connected to, or forms part of the valve rod, of the main valve. These parts are not shown, as they are well known and form no part of my invention. In fact the main valve and its operating mechanism is the well known Warner valve turned upon its side, instead of vertically as formerly. The rope carriage or yoke E. carried by the pulleys e and their axles e, guided between the tubular rods 6 are also well known and need not therefore be specifically described. The main valve within the case 0, has a rod 0, which passes out through a packing gland c in the end of the elbow b, which connects the valve 0, and the exhaust pipe B. and terminates in forked lugs by which it is connected to a swinging arm 0 which is con-- nected at its upper end to one end of a link the opposite end of which is pivoted between lugs which project up from the flanged end of the valve case 0. The lower end of the swinging arm 0 terminates in a loop, through which loop passes a sliding bar F, which is guided in tubular bearings which project inward from the vertical ends of yokes F. which yokes are clipped upon the carriage guides 6 The bar F, has adjustable collars f, f, upon it upon opposite sides of the pendent arm 0, by which said arm is moved to close the supply to, or exhaust from, the cylinder as the rod F is made to move in either direction. The axles 8, upon one side of the carriage project some distance through their wheels e, and pass through perforations in the end of a bar G. which is held in place by nuts e from the bar G, project perforated lugs g, in the outer ends of which is secured a rod g. This rod passes through a perforated boss in a tappet 9 which is adjustable along the bar by means of a set screw. The rear end of the tappet is forked to pass upon each side of a longitudinal rib 9 formed on the front edge of the bar G- In the position shown in the drawings the pendent arm 0, is shown in the position it is to occupy when the supply to, and exhaust from, the cylinder are cut off and the platform or cage is set atrest. The position of the tappet 9 in Fig. 1 shows that the pendent arm 0 has been brought to the vertical position to cut off the supply by the tappet g and to stop the cab or platform at the upper floor of the building. In this position it will be impossible for any one to again open the supply to the cylinder so that the cab can not be made to move above the limit of its travel, nor will it move farther even were the valve controlling mechanism which is operated from the cab to break, or refuse to act from any cause, but when the main valve is moved through the wheel D, to open the exhaust and allow the cab to descend the lower end of the rod 0 will be drawn by the rod 0, in the direction of the cylinder if the cab is allowed to descend, until it reaches to near its lower limit, just preceding which, the tappet g will have reached the .collar f, on rod F and carried the rod along with it until the collar f strikes the side of the rod 0 nearest the cylinder head and again brings arm 0 to its vertical position, by which time the cab has reached the lower limit of its travel, and the exhaust can not again be opened while the cab is in this position.

To insure that the platform or cab will come to a gradual but positive stop I connect the branch water pipe B to the top of the cylinder A, so that each time the cylinder is ex hausted, the air which accumulates in the top of the cylinder will be carried off with the exhaust water through the pipe B, to the sewer. A small branch pipe a, provided with suitable valves connects the lower part of the cylinder with the waste pipe B, for the purpose of freeing the cylinder from any sediment, which is done, by occasionally opening the valves 0/. It is better to open communication between the lower part of the cylinder and the waste pipe while the cab is descending.

To prevent injury to the cylinder head and gradually stop the cab or platform at the upper limit of its travel should all means for operating the main valve fail to work I have provided an elastic cushion between the rope, yoke and cylinder head. This consists of the metal block H,- which has its corners cut away to allow its ends to pass loosely between the guide rods 6, by which it is supported, as clearly seen in Fig. 3. In the middle of the block II, is formed a perforated boss h, to receive a rubber plug h which is centrally perforated to pass the piston rod A.

It is obvious that instead of connecting my automatic cut ofi mechanism with the valve rod 0, it may be connected to an extension of the rack bar, at the opposite end of the valve case 0, and this could be best accomplished by reversing the valve case 0, end for end.

case, the swinging arm 0 pivoted above the valve extending down along side of the carriage frame, and connected to the valve rod 0, the sliding rod F carrying collars ff. and guided in its bearings which are secured to the carriage frame, the tappet g carried by the carriage and having a forked end to traverse said rod F, between the collars, for the purpose of moving the said arm 0 in either direction to automatically cut off the supply or exhaust ports of valve C.

2. The combination of cylinder A, valve 0, valve rod 0, extending through exhaust elbow B the link 0 pivoted in lugs upon the valve case, the depending arm 0 pivoted to the end of the link 0 connected to the valve rod 0, and having its lower end formed into a loop, the yokes F secured to the guide rods of the carriage, the rod F, fitted to slidein said yokes and passing through the loop of arm the collars f. f. upon said rod upon opposite sides of said arm, the bar G, carried by the carriage and having lugs g, the rod g secured in said lugs, and the tappet g secured upon said rod and having its forked ends passing above and below the rod F substantially as and for the purpose set forth.

3. The combination substantially as hereinbefore set forth of the cylinder of a pulling elevator, of the carriage, and carriage guide rods, of the perforated block H. h, fitted loosely between the guide rods and the cylinder head and carriage, and the perforated rubber block carried by said block H, for the purpose of protecting the cylinder head should the valve mechanism fail to operate.

CHARLES H. M. ATKINS.

WVitnesses: I

GEO. J. MURRAY, W. F. MURRAY. 

